GS1524_11 Datasheet, PDF (1/16 Pages) Gennum Corporation – Multi-Rate SDI Adaptive Cable Equalizer

GS1524 Multi-Rate SDI Adaptive Cable Equalizer
Key Features
• SMPTE 292M, SMPTE 344M and SMPTE 259M
compliant
• automatic cable equalization
• multi-standard operation from 143Mb/s to 1.485Gb/s
• supports DVB-ASI at 270Mb/s
• manual bypass (useful for low data rates with slow
rise/fall times)
• performance optimized for 270Mb/s and 1.485Gb/s
• typical maximum equalized length of Belden 1694A
cable: 140m at 1.485Gb/s, 350m at 270Mb/s
• 50Ω differential output (with internal 50Ω pull-ups)
• Pb-free and RoHS Compliant
• cable length indicator for SMPTE 259M inputs
• output mute based on max cable length adjust or
manual override
• single 3.3V power supply operation
• operating temperature range: 0°C to +70°C
Applications
• SMPTE 292M, SMPTE 344M and SMPTE 259M Coaxial
Cable Serial Digital Interfaces
Description
The GS1524 is a second-generation high-speed bipolar
integrated circuit designed to equalize and restore signals
received over 75Ω co-axial cable at data rates from 143Mb/s
up to 1.485Gb/s. The GS1524 is designed to support SMPTE
292M, SMPTE 344M and SMPTE 259M, and is optimized for
performance at 270Mb/s and 1.485Gb/s.
The GS1524 features DC restoration to compensate for the
DC content of SMPTE pathological test patterns. The
GS1524 also incorporates a Cable Length Indicator (CLI)
that provides an indication of the amount of cable being
equalized for data rates up to 360Mb/s.
A voltage programmable mute threshold (MCLADJ) is
included to allow muting of the GS1524 output when an
approximate selected cable length is reached for SMPTE
259M signals. This feature allows the GS1524 to distinguish
between low amplitude SD-SDI signals and noise at the
input of the device. The CD/MUTE pin provides an
indication of the GS1524 mute status in addition to
functioning as a mute control input. The SD outputs of the
GS1524 may be forced to a mute state by applying a voltage
to the CD/MUTE pin.
Power consumption is typically 265mW using a 3.3V
power supply.
This component and all homogeneous subcomponents are
RoHS compliant.
MCLADJ
CABLE LENGTH INDICATOR/ADJUSTOR
CARRIER DETECT
MUTE
SDI
EQUALIZER
SDI
DC RESTORE
OUTPUT
AGC
Functional Block Diagram
GS1524 Multi-Rate SDI Adaptive Cable Equalizer
Data Sheet
14976 - 11
August 2011
www.gennum.com
CLI
CD/MUTE
BYPASS
SDO
SDO
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